﻿var myDate = new Date(); 
myDate.getYear();        //获取当前年份(2位) 
myDate.getFullYear();    //获取完整的年份(4位,1970-????) 
myDate.getMonth();       //获取当前月份(0-11,0代表1月) 
myDate.getDate();        //获取当前日(1-31) 
myDate.getDay();         //获取当前星期X(0-6,0代表星期天) 
myDate.getTime();        //获取当前时间(从1970.1.1开始的毫秒数) 
myDate.getHours();       //获取当前小时数(0-23) 
myDate.getMinutes();     //获取当前分钟数(0-59) 
myDate.getSeconds();     //获取当前秒数(0-59) 
myDate.getMilliseconds();    //获取当前毫秒数(0-999) 
myDate.toLocaleDateString();     //获取当前日期 
var mytime=myDate.toLocaleTimeString();     //获取当前时间 
myDate.toLocaleString( );        //获取日期与时间 


/*日期时间脚本库方法列表 

Date.prototype.isLeapYear 判断闰年 
Date.prototype.Format 日期格式化 
Date.prototype.DateAdd 日期计算 
Date.prototype.DateDiff 比较日期差 
Date.prototype.toString 日期转字符串 
Date.prototype.toArray 日期分割为数组 
Date.prototype.DatePart 取日期的部分信息 
Date.prototype.MaxDayOfDate 取日期所在月的最大天数 
Date.prototype.WeekNumOfYear 判断日期所在年的第几周 
StringToDate 字符串转日期型 
IsValidDate 验证日期有效性 
CheckDateTime 完整日期时间检查 
daysBetween 日期天数差 

js代码： */

//---------------------------------------------------   
// 判断闰年   
//---------------------------------------------------   
Date.prototype.isLeapYear = function()    
{    
    return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0)));    
}    
   
//---------------------------------------------------   
// 日期格式化   
// 格式 YYYY/yyyy/YY/yy 表示年份   
// MM/M 月份   
// W/w 星期   
// dd/DD/d/D 日期   
// hh/HH/h/H 时间   
// mm/m 分钟   
// ss/SS/s/S 秒   
//---------------------------------------------------   
Date.prototype.Format = function(formatStr)    
{    
    var str = formatStr;    
    var Week = ['日','一','二','三','四','五','六'];   
   
    str=str.replace(/yyyy|YYYY/,this.getFullYear());    
    str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100));    
   
    str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth());    
    str=str.replace(/M/g,this.getMonth());    
   
    str=str.replace(/w|W/g,Week[this.getDay()]);    
   
    str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate());    
    str=str.replace(/d|D/g,this.getDate());    
   
    str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours());    
    str=str.replace(/h|H/g,this.getHours());    
    str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes());    
    str=str.replace(/m/g,this.getMinutes());    
   
    str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds());    
    str=str.replace(/s|S/g,this.getSeconds());    
   
    return str;    
}    
   
//+---------------------------------------------------   
//| 求两个时间的天数差 日期格式为 YYYY-MM-dd    
//+---------------------------------------------------   
function daysBetween(DateOne,DateTwo)   
{    
    var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ('-'));   
    var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ('-')+1);   
    var OneYear = DateOne.substring(0,DateOne.indexOf ('-'));   
   
    var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ('-'));   
    var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ('-')+1);   
    var TwoYear = DateTwo.substring(0,DateTwo.indexOf ('-'));   
   
    var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000);    
    return Math.abs(cha);   
}   
   
   
//+---------------------------------------------------   
//| 日期计算   
//+---------------------------------------------------   
Date.prototype.DateAdd = function(strInterval, Number) {    
    var dtTmp = this;   
    switch (strInterval) {    
        case 's' :return new Date(Date.parse(dtTmp) + (1000 * Number));   
        case 'n' :return new Date(Date.parse(dtTmp) + (60000 * Number));   
        case 'h' :return new Date(Date.parse(dtTmp) + (3600000 * Number));   
        case 'd' :return new Date(Date.parse(dtTmp) + (86400000 * Number));   
        case 'w' :return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));   
        case 'q' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());   
        case 'm' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());   
        case 'y' :return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());   
    }   
}   
   
//+---------------------------------------------------   
//| 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串   
//+---------------------------------------------------   
Date.prototype.DateDiff = function(strInterval, dtEnd) {    
    var dtStart = this;   
    if (typeof dtEnd == 'string' )//如果是字符串转换为日期型   
    {    
        dtEnd = StringToDate(dtEnd);   
    }   
    switch (strInterval) {    
        case 's' :return parseInt((dtEnd - dtStart) / 1000);   
        case 'n' :return parseInt((dtEnd - dtStart) / 60000);   
        case 'h' :return parseInt((dtEnd - dtStart) / 3600000);   
        case 'd' :return parseInt((dtEnd - dtStart) / 86400000);   
        case 'w' :return parseInt((dtEnd - dtStart) / (86400000 * 7));   
        case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12) - (dtStart.getMonth()+1);   
        case 'y' :return dtEnd.getFullYear() - dtStart.getFullYear();   
    }   
}   
   
//+---------------------------------------------------   
//| 日期输出字符串，重载了系统的toString方法   
//+---------------------------------------------------   
Date.prototype.toString = function(showWeek)   
{    
    var myDate= this;   
    var str = myDate.toLocaleDateString();   
    if (showWeek)   
    {    
        var Week = ['日','一','二','三','四','五','六'];   
        str += ' 星期' + Week[myDate.getDay()];   
    }   
    return str;   
}   
   
//+---------------------------------------------------   
//| 日期合法性验证   
//| 格式为：YYYY-MM-DD或YYYY/MM/DD   
//+---------------------------------------------------   
function IsValidDate(DateStr)    
{    
    var sDate=DateStr.replace(/(^/s+|/s+$)/g,''); //去两边空格;    
    if(sDate=='') return true;    
    //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''    
    //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式    
    var s = sDate.replace(/[/d]{ 4,4 }[/-/]{ 1 }[/d]{ 1,2 }[/-/]{ 1 }[/d]{ 1,2 }/g,'');    
    if (s=='') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D    
    {    
        var t=new Date(sDate.replace(//-/g,'/'));    
        var ar = sDate.split(/[-/:]/);    
        if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate())    
        {    
            //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');    
            return false;    
        }    
    }    
    else    
    {    
        //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');    
        return false;    
    }    
    return true;    
}    
   
//+---------------------------------------------------   
//| 日期时间检查   
//| 格式为：YYYY-MM-DD HH:MM:SS   
//+---------------------------------------------------   
function CheckDateTime(str)   
{    
    var reg = /^(/d+)-(/d{ 1,2 })-(/d{ 1,2 }) (/d{ 1,2 }):(/d{ 1,2 }):(/d{ 1,2 })$/;    
    var r = str.match(reg);    
    if(r==null)return false;    
    r[2]=r[2]-1;    
    var d= new Date(r[1],r[2],r[3],r[4],r[5],r[6]);    
    if(d.getFullYear()!=r[1])return false;    
    if(d.getMonth()!=r[2])return false;    
    if(d.getDate()!=r[3])return false;    
    if(d.getHours()!=r[4])return false;    
    if(d.getMinutes()!=r[5])return false;    
    if(d.getSeconds()!=r[6])return false;    
    return true;    
}    
   
//+---------------------------------------------------   
//| 把日期分割成数组   
//+---------------------------------------------------   
Date.prototype.toArray = function()   
{    
    var myDate = this;   
    var myArray = Array();   
    myArray[0] = myDate.getFullYear();   
    myArray[1] = myDate.getMonth();   
    myArray[2] = myDate.getDate();   
    myArray[3] = myDate.getHours();   
    myArray[4] = myDate.getMinutes();   
    myArray[5] = myDate.getSeconds();   
    return myArray;   
}   
   
//+---------------------------------------------------   
//| 取得日期数据信息   
//| 参数 interval 表示数据类型   
//| y 年 m月 d日 w星期 ww周 h时 n分 s秒   
//+---------------------------------------------------   
Date.prototype.DatePart = function(interval)   
{    
    var myDate = this;   
    var partStr='';   
    var Week = ['日','一','二','三','四','五','六'];   
    switch (interval)   
    {    
        case 'y' :partStr = myDate.getFullYear();break;   
        case 'm' :partStr = myDate.getMonth()+1;break;   
        case 'd' :partStr = myDate.getDate();break;   
        case 'w' :partStr = Week[myDate.getDay()];break;   
        case 'ww' :partStr = myDate.WeekNumOfYear();break;   
        case 'h' :partStr = myDate.getHours();break;   
        case 'n' :partStr = myDate.getMinutes();break;   
        case 's' :partStr = myDate.getSeconds();break;   
    }   
    return partStr;   
}   
   
//+---------------------------------------------------   
//| 取得当前日期所在月的最大天数   
//+---------------------------------------------------   
Date.prototype.MaxDayOfDate = function()   
{    
    var myDate = this;   
    var ary = myDate.toArray();   
    var date1 = (new Date(ary[0],ary[1]+1,1));   
    var date2 = date1.dateAdd(1,'m',1);   
    var result = dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd'));   
    return result;   
}   
   
//+---------------------------------------------------   
//| 取得当前日期所在周是一年中的第几周   
//+---------------------------------------------------   
Date.prototype.WeekNumOfYear = function()   
{    
    var myDate = this;   
    var ary = myDate.toArray();   
    var year = ary[0];   
    var month = ary[1]+1;   
    var day = ary[2];   
    document.write('< script language=VBScript/> /n');   
    document.write('myDate = DateValue(''+month+'-'+day+'-'+year+'') /n');   
    document.write('result = DatePart('ww', myDate) /n');   
    document.write(' /n');   
    return result;   
}   
   
//+---------------------------------------------------   
//| 字符串转成日期类型    
//| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd   
//+---------------------------------------------------   
function StringToDate(DateStr)   
{    
   
    var converted = Date.parse(DateStr);   
    var myDate = new Date(converted);   
    if (isNaN(myDate))   
    {    
        //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';   
        var arys= DateStr.split('-');   
        myDate = new Date(arys[0],--arys[1],arys[2]);   
    }   
    return myDate;   
}   

//算出当前日期的前一天日期
 
var myDate = new Date();
 var eDate = myDate.toLocaleDateString();
 var year = myDate.getFullYear();
 var month = myDate.getMonth() + 1;
 var day = myDate.getDate();
 var edate = year + "-"+ month + "-" + day; //结束日期
 
 var uom = new Date(year,month,day);
 uom.setDate(uom.getDate()-1);
 var smonth = uom.getMonth(); 
 alert(smonth)
 var sday = uom.getDate(); 
 var syear = uom.getFullYear();
 if(day == 1 && month == 1)
 {
  smonth = 12;
  syear--;
  sday = getDaysInMonth(syear,smonth);
 }
 else if(day == 1)
 {
  sday = getDaysInMonth(syear,smonth);
 }
 
 var sdate = syear + "-"+ smonth + "-" + sday; //开始日期
 
 $("#Starttime").val(sdate);
 $("#Endtime").val(edate);
 

//得到一个月有多少天
function getDaysInMonth(year,month)
{
 month = parseInt(month,10)+1;
 var temp = new Date(year+"/"+month+"/0");
 return temp.getDate();
}
 
//算出两个日期的间隔天数
function DateDiff(sDate1, sDate2)
{
 var aDate, oDate1, oDate2, iDays;
 aDate = sDate1.split("-");
 oDate1 = new Date(aDate[1] + '-' + aDate[2] + '-' + aDate[0]); //转换为12-18-2002格式
 aDate = sDate2.split("-");
 oDate2 = new Date(aDate[1] + '-' + aDate[2] + '-' + aDate[0]);
 iDays = parseInt(Math.abs(oDate1 - oDate2) / 1000 / 60 / 60 /24); //把相差的毫秒数转换为天数
 return iDays;
}
//得到一个月有多少天
function getDaysInMonth(year,month)
{
 month = parseInt(month,10)+1;
 var temp = new Date(year+"/"+month+"/0");
 return temp.getDate();
}
//减法运算
function sub(arg1, arg2) {
    var r1, r2, m, n;
    try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
    try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
    m = Math.pow(10, Math.max(r1, r2));
    //动态控制精度长度
    n = (r1 >= r2) ? r1 : r2;
    return parseFloat(((arg1 * m - arg2 * m) / m).toFixed(n));
}
